On 08/23/2012 04:26 PM, Eric Dumazet wrote:
skb->truesize is adjusted when a frag is added to one skb, or when
skb->head is re-allocated.
Are you sure you dont have another problem, because as I said commit
c8628155ece3 had a bug, so a bisect is not very useful.
How many reloads are needed to trigger the bug, do you have a script to
reproduce it ?
I was doing the tests with a browser; however, it seems that a wget of that same
page is much more effective at triggering the problem. Now I have a script that
tries 60 passes of
wget https://bugzilla.redhat.com/show_bug.cgi?id=847525
I usually get failures on the first or second try. A kernel built from "git
checkout c862815" gets the following wget output:
============================================================================
--2012-08-23 21:50:32-- https://bugzilla.redhat.com/show_bug.cgi?id=847525
Resolving bugzilla.redhat.com (bugzilla.redhat.com)... 209.132.183.69
Connecting to bugzilla.redhat.com (bugzilla.redhat.com)|209.132.183.69|:443...
connected.
OpenSSL: error:0D0680A8:asn1 encoding routines:ASN1_CHECK_TLEN:wrong tag
OpenSSL: error:0D07803A:asn1 encoding routines:ASN1_ITEM_EX_D2I:nested asn1 error
OpenSSL: error:0D08303A:asn1 encoding routines:ASN1_TEMPLATE_NOEXP_D2I:nested
asn1 error
OpenSSL: error:0D08303A:asn1 encoding routines:ASN1_TEMPLATE_NOEXP_D2I:nested
asn1 error
OpenSSL: error:1409000D:SSL routines:SSL3_GET_SERVER_CERTIFICATE:ASN1 lib
Unable to establish SSL connection.
============================================================================
With kernel 3.6-rc2, the error changes to the following:
============================================================================
--2012-08-24 08:26:42-- https://bugzilla.redhat.com/show_bug.cgi?id=847525
Resolving bugzilla.redhat.com (bugzilla.redhat.com)... 209.132.183.69
Connecting to bugzilla.redhat.com (bugzilla.redhat.com)|209.132.183.69|:443...
connected.
HTTP request sent, awaiting response... 200 OK
Length: unspecified [text/html]
Saving to: `show_bug.cgi?id=847525.3'
[ <=> ] 0 --.-K/s in 0s
2012-08-24 08:26:45 (0.00 B/s) - Read error at byte 0 (error:1408F119:SSL
routines:SSL3_GET_RECORD:decryption failed or bad record mac).Retrying.
============================================================================
Could it be a PMTU problem ? (check
http://git.kernel.org/?p=linux/kernel/git/davem/net.git;a=commit;h=9b04f350057863d1fad1ba071e09362a1da3503e )
I added the PMTU patch to kernel 3.6-rc2 - nothing changed.
Anything else to try?
Thanks,
Larry
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